package com.gome.bg.interceptors;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;
import com.gome.bg.util.MySessionContext;
import com.gome.util.TraceInfo;

public class MvcInterceptors implements HandlerInterceptor{
	
	private MySessionContext myc = MySessionContext.getInstance();
	
	private String mappingURL;//利用正则映射到需要拦截的路径    
	
    public void setMappingURL(String mappingURL) {    
           this.mappingURL = mappingURL;    
   }   
	
	
    /** 
     * 在DispatcherServlet完全处理完请求后被调用  
     *  
     *   当有拦截器抛出异常时,会从当前拦截器往回执行所有的拦截器的afterCompletion() 
     */  
	public void afterCompletion(HttpServletRequest arg0,
			HttpServletResponse arg1, Object arg2, Exception arg3)
			throws Exception {
		// TODO Auto-generated method stub
		
		//TraceInfo.traceInfo("==============执行顺序: 3、afterCompletion================"); 
		
	}
	//在业务处理器处理请求执行完成后,生成视图之前执行的动作
	public void postHandle(HttpServletRequest arg0, HttpServletResponse arg1,
			Object arg2, ModelAndView arg3) throws Exception {
		// TODO Auto-generated method stub
		//TraceInfo.traceInfo("==============执行顺序: 2、postHandle================");  
		
	}
	
	/** 
     * 在业务处理器处理请求之前被调用 
     * 如果返回false 
     *     从当前的拦截器往回执行所有拦截器的afterCompletion(),再退出拦截器链 
     *  
     * 如果返回true 
     *    执行下一个拦截器,直到所有的拦截器都执行完毕 
     *    再执行被拦截的Controller 
     *    然后进入拦截器链, 
     *    从最后一个拦截器往回执行所有的postHandle() 
     *    接着再从最后一个拦截器往回执行所有的afterCompletion() 
     */  
	public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object obj) throws Exception {
		//TraceInfo.traceInfo("==============执行顺序: 1、preHandle================");
		boolean flag = false;
//		request.setCharacterEncoding("UTF-8");
//		response.setCharacterEncoding("UTF-8");
//		TraceInfo.traceInfo(mappingURL);
//		TraceInfo.traceInfo("********************************************");
//		HttpSession session = request.getSession();
//		TraceInfo.traceInfo(session.getId());
//		String url = request.getRequestURL().toString();
//		if (mappingURL != null && url.endsWith(mappingURL)) {
//			TraceInfo.traceInfo(mappingURL != null && url.endsWith(mappingURL));
//			flag = true;
//		} else {
//			TraceInfo.traceInfo(mappingURL != null && url.endsWith(mappingURL));
//			String session_id = session.getId();
//			TraceInfo.traceInfo(session_id);
//			HttpSession sess = myc.getSession(session_id);
//			TraceInfo.traceInfo(sess);
//			if (session == sess) {
				flag = true;
//			}
//		}
		return flag;
	}
}
